A low-epimerizing peptide coupling reagent based on the rearrangement of a carboxylic-sulfonic mixed anhydride
作者:Daniel Cabaret、Michel Wakselman
DOI:10.1016/0040-4039(94)88511-7
日期:1994.12
chloride as the condensation reagent. Experimentally, the coupling is a one pot two-steps reaction: formation and aminolysis of a substituted aryl ester. The first step occurs by an elimination-addition reaction involving a sulfoquinone intermediate, followed by an efficient six-membered acyl transfer reaction in the phenolic carboxylic-sulfonic mixed anhydride intermediate. The Young and Anteunis tests show
使用邻羟基苯磺酰氯作为缩合剂已经制备了一系列肽。实验上,偶联是一锅两步的反应:取代的芳基酯的形成和氨解。第一步是通过涉及磺醌中间体的消除加成反应发生的,然后在酚类羧酸-磺酸混合酸酐中间体中进行有效的六元酰基转移反应。Young和Anteunis试验表明,在二氯甲烷和乙腈中差向异构的程度很低。